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设置留茬高度分别为 0、6、12cm 3个处理 ,对闽牧 4 2牧草影响的结果表明 :留茬高度为 6cm时 ,闽牧4 2牧草的平均再发植株数、干草产量分别是 12 9 1株 /m2 和 4 1 83t/hm2 ;0cm时 (与地面平割 ) ,可明显降低闽牧 4 2牧草的平均再发植株数 (P <0 0 1) ,进而显著降低牧草的产量 (P <0 0 5 ) ,与留茬高度 6cm相比 ,平均干草产量下降了 13 3% ,再发植株数降低了 13 2 %。而留茬高度为 6cm和 12cm之间的平均干草产量差异不大 (P >0 0 5 ) ;留茬高度对闽牧 4 2营养成分和生长速度的影响均不显著 (P >0 0 5 )。故收割时适宜的留茬高度为 6cm。
The results showed that when the height of stubble was 6cm, the average numbers of re-plants and hay production of 4 grasses in Minmu were 12 and 12 respectively 9 1 plants / m2 and 4 1 83 t / hm2; 0 cm when cut with the ground, significantly reduced the average number of re-plants (P <0.01) in Min-mu 4 2 pasture and significantly reduced the yield of pasture P <0 05). Compared with the stubble height of 6 cm, the average hay yield decreased by 13 3% and the number of re-plantation decreased by 132%. (P> 0.05). The effect of stubble height on the nutrient composition and growth rate of Min-MU 4 2 was not significant (P> 0.05) . Therefore, harvest stubble suitable height of 6cm.